Related Experiment Video

Updated: May 13, 2026

Assessing Differences in Sperm Competitive Ability in Drosophila
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Assessing Differences in Sperm Competitive Ability in Drosophila

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Sex-linked strategies of human reproductive behavior

K Jaffe1, D Urribarri, G C Chacon

  • 1Departamento de Biologia de Organismos, Universidad Simon Bolivar, Caracas, Venezuela.

Social Biology
|January 1, 1993
PubMed

Keywords:
AmericasBehaviorData AnalysisDemographic FactorsDeveloping CountriesFertility--menFertility--womenLatin AmericaMultiple PartnersPopulationPopulation CharacteristicsPopulation DynamicsReproductive BehaviorResearch MethodologyResearch ReportSampling StudiesSex BehaviorSex FactorsSexual PartnersSouth AmericaStudiesSurveysVenezuela

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The Ratio of X Chromosome to Autosomes02:45

The Ratio of X Chromosome to Autosomes

In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.  
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X-linked Traits01:19

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